Finding the Fourth Proportional to 2,942.38, 4,412.82 and 861.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,942.38 : 4,412.82 = 861.82 : x
2. Step 2: Convert to fraction form
   2,942.38/4,412.82 = 861.82/x
3. Step 3: Cross multiply
   2,942.38x = 4,412.82 × 861.82
4. Step 4: Simplify right side
   2,942.38x = 3,803,056.53
5. Step 5: Solve for x
   x = 3,803,056.53/2,942.38
6. Step 6: Final answer
   x = 1,292.51